Has anyone used a frame grabber with a cvbs composite camera and openCV? I have a few cameras that I want to collect images at around 4 per second and will need to buy some hardware to get it into my computer. Looking for hardware suggestions. I do not need audio. I was looking at the Sensoray 8-channel frame grabber Model 812
(8-Channel Frame Grabber with Mono Audio Capture | Model 812)